package day9;

public class zifu {
    public static void main(String[] args) {

                Fu f = new Zi();
                System.out.println(f.num);
                f.method();
            }
        }


    class Fu {
        int num = 10;

        public void method() {
            System.out.println("Fu.. method");
        }
    }

    class Zi extends Fu {
        int num = 20;

        public void method() {
            System.out.println("Zi.. method");
        }
    }



